Ultraviolet-B acclimation is supported by functionally heterogeneous phenolic peroxidases.

ABSTRACT: Tobacco plants were grown in plant chambers for four weeks, then exposed to one of the following treatments for 4 days: (1) daily supplementary UV-B radiation corresponding to 6.9 kJ m^-2 d^-1 biologically effective dose (UV-B), (2) daily irrigation with 0.1 mM hydrogen peroxide, or (3) a parallel application of the two treatments (UV-B + H₂O₂). Neither the H₂O₂ nor the UV-B treatments were found to be damaging to leaf photosynthesis. Both single factor treatments increased leaf H₂O₂ contents but had distinct effects on various H₂O₂ neutralising mechanisms. Non-enzymatic H₂O₂ antioxidant capacities were increased by direct H₂O₂ treatment on

SUBMITTER: Racz A 

PROVIDER: S-EPMC7530754 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature